With the development of the economy, various types and types of heat exchangers have developed rapidly, and heat exchangers with new structures and new materials have emerged. In order to meet the needs of development, China has established standards for certain types of heat exchangers and formed a series. The perfect heat exchanger should meet the following basic requirements when designing or selecting:
(1) Reasonably achieve the specified process conditions;
(2) The structure is safe and reliable;
(3) Easy to manufacture, install, operate and maintain;
(4) Economically reasonable.
The one end tube plate of the floating head heat exchanger is fixed to the casing, and the tube plate at the other end can float freely in the casing, and the casing and the tube bundle are free to expand, so when the temperature difference between the two media is large, the tube bundle and No temperature difference stress is generated between the housings. The floating end is designed as a detachable structure so that the tube bundle can be easily inserted or withdrawn from the housing. (Also designed to be unremovable). This provides convenience for inspection and cleaning. However, the structure of the heat exchanger is complicated, and the floating end small cover cannot know the leakage during operation. Therefore, pay special attention to the seal when installing.
The structure of the floating head portion of the floating head heat exchanger can be designed in various forms according to different requirements. In addition to the necessity of free movement of the tube bundle within the device, it is also necessary to consider the convenience of inspection, installation and cleaning of the floating head portion.